21985808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{105701}}^1$

素因数の和:105722

約数の個数: 20

約数和(自身を含む): 45874668

約数和(自身を除く): 23888860

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 105701, 211402, 422804, 845608, 1374113, 1691216, 2748226, 5496452, 10992904, 21985808]

約数ペア:

[(1, 21985808), (2, 10992904), (4, 5496452), (8, 2748226), (13, 1691216), (16, 1374113), (26, 845608), (52, 422804), (104, 211402), (208, 105701)]